Chapter 5 Internet Access; Tcp/Ip And Dhcp For Lan; Ip Address And Subnet Mask; Rip Setup - ZyXEL Communications PRESTIGE 1400 User Manual

5.1

TCP/IP and DHCP for LAN

The Prestige has built-in DHCP server capability that assigns IP addresses and DNS servers to systems that support
DHCP client capability.
5.1.1

IP Address and Subnet Mask

Machines on a LAN share one common network number; once you have decided on the network number, pick an
IP address that is easy to remember for your Prestige.
The subnet mask specifies the network number portion of an IP address. Your Prestige will compute the subnet
mask automatically based on the IP address that you entered. You don't need to change the subnet mask computed
by the Prestige unless you are instructed to do otherwise.
5.1.2

RIP Setup

RIP (Routing Information Protocol, RFC1058 and RFC 1389) allows a router to exchange routing information with
other routers. The RIP Direction field controls the sending and receiving of RIP packets. When set to:
1. Both - the Prestige will broadcast its routing table periodically and incorporate the RIP information that it
receives.
2. In Only - the Prestige will not send any RIP packets but will accept all RIP packets received.
3. Out Only - the Prestige will send out RIP packets but will not accept any RIP packets received.
4. None - the Prestige will not send any RIP packets and will ignore any RIP packets received.
The Version field controls the format and the broadcasting method of the RIP packets that the Prestige sends (it
recognizes both formats when receiving). RIP-1 is universally supported; but RIP-2 carries more information.
RIP-1 is probably adequate for most networks, unless you have an unusual network topology.
Both RIP-2B and RIP-2M sends the routing data in RIP-2 format; the difference being that RIP-2B uses subnet
broadcasting while RIP-2M uses multicasting. Multicasting can reduce the load on non-router machines since they
generally do not listen to the RIP multicast address and so will not receive the RIP packets. However, if one router
uses multicasting, then all routers on your network must also use multicasting.
By default, RIP direction is set to Both and Version is set to RIP-1.
5.1.3

DHCP Configuration

DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients (workstations)
to obtain the TCP/IP configuration at start-up from a server. You can configure the Prestige as a DHCP server or
disable it. When configured as a server, the Prestige provides the TCP/IP configuration for the clients. If set to
None, DHCP service will be disabled and you must have another DHCP sever on your LAN, or else the
workstation must be manually configured.
Internet Access
Prestige 1400 WAN Router with Integrated Ethernet Switch
This chapter shows you how to configure the Prestige for Internet access.
Chapter 5
Internet Access
5-1